Hypothetically, if a mod existed, you would need to sideload it. iOS restricts sideloading heavily:
The only 100% reliable way to download music for offline use is through the official Apple Music app with a standard subscription. apple music mod ipa download work
On-device installers that use enterprise certificates. These are often revoked by Apple, causing the app to crash. The Risks: Is It Worth It? Hypothetically, if a mod existed, you would need